Collection expressions passed as IEnumerable don't have vtables generated in AOT

[manodasanW]

Repro:

instance.SetCharIterable(['c']);

Will need to investigate how to get a vtable generated based on the static declaration as a fallback if there is no vtable for the runtime type.

[eduardobragaxz]

In WinUI I can't set the List/ItemsView source to an IEnumerable when in AOT. Is it related to this?

[manodasanW]

@eduardobragaxz Do you see the issue with the latest CsWinRT preview 2.1.0-prerelease.240801.1. There was a fix it had related to IEnumerable.

If you still see the issue, what is the implementation type (class) of the IEnumerable. An easy way to check is to print out the result of .GetType(). That is what we generate the vtable based on and that will help determine what the issue is.

[eduardobragaxz]

@manodasanW Yes, with the latest preview.

CollectionRepo.MainWindow+<GetNumbers>d__2 

is what I get.

[hez2010]

Will need to investigate how to get a vtable generated based on the static declaration as a fallback if there is no vtable for the runtime type.

Can we test whether the type implements IEnumerable, and if so, give it a vtable for IEnumerable<object>?